She ends up in a sex shop, so of course you're required to follow her inside. You wouldn't want to lose her! Roam around without getting too distracted by the ... ahem ... items and people in there. Go to the red spot in the back. You see a cut scene of the girl in the outfit. She talks to "Master Benny" and says she'll meet him at her house.

Now you have to get a gimp suit. You find it in back, in the changing room. Now you walk out in a full leather ... outfit. Iiiiiinteresting. Again, you have to follow her in your car at a safe distance.

Kill off Benny so that you can take his place.

When you get to the house, she lets you in. She thinks you're the Master. The room is a complete torture room. The door closes for the "torture" part of the session. Now you have a girlfriend who you have to wine and dine to get the info from.

Mission passed
respect +

Grand Theft Auto San Andreas Walkthrough